<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
  <script src="../react18/prop-types.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    /* 
      
    */
    class App extends React.Component{
      state = {
        name:"laowang",
        age:18,
        hobby:"吃饭"
      }
      render(){
        const {name,age,hobby} = this.state;
        return (
          <div>
            姓名: <input type="text" value={name} onChange={this.changeForm("name")} />
            <br/>
            年龄: <input type="text" value={age} onChange={this.changeForm("age")} />
            <br/>
            爱好: <input type="text" value={hobby} onChange={this.changeForm("hobby")} />  
            <br/>
            <button onClick={this.handle}>提交</button>  
          </div>
        )
      }

      //changeForm函数在虚拟DOM渲染的时候就已经调用了,会把这个函数的返回值交给了onChange
      /* 
        changeForm:是一个高阶函数
        下边这种写法:函数柯里化的写法
      */
      changeForm = (type) => {
        console.log(type);

        //返回的函数才是真正的onChange事件函数
        return (e) => {
          const {value} = e.target;
          this.setState({[type]:value})
        }
      }


      handle = () => {
        const {name,age,hobby} = this.state;
        console.log(name,age,hobby);
      }
    }

    

    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<App/>)

  </script>
</body>

</html>